This is a list of characters from the Cartoon Network animated television series Foster's Home for Imaginary Friends. Main characters Mac Mac (voiced by Sean Marquette) is Terrence’s younger brother who is a bright and creative eight-year-old boy and Bloo's creator who visits Foster's every day. Mac is often the voice of reason among his friends when they are making decisions. However, his extremely good nature tends to make him somewhat naive. He is very attached to Bloo and it is shown that his biggest fear is never seeing him again, because Bloo is what keeps him happy and cheerful and vice versa. Mac becomes hyperactive to the point of a rabid mania when he eats sugar. Once in this state, he becomes impossible to control, will often become obsessed with seeking any other source of sugar. He, alongside Bloo, made a cameo appearance in The Powerpuff Girls series finale, "The Powerpuff Girls Rule!". Bloo Blooregard "Bloo" Q. Kazoo (voiced by Keith Ferguson) is Mac's blue and cylinder-domed no. 71 imaginary friend and best friend who is often very immature, self-centered and egotistical as well as having a knack for getting in trouble and prone for doing kid's and children's antics. Despite all this, he still has a good heart and apologizes for his actions. Bloo loves paddle-balls even though he cannot make the ball hit the paddle. His full name is Blooregard Q. Kazoo. He, along with Mac, made a cameo appearance in The Powerpuff Girls series finale, "The Powerpuff Girls Rule!". Wilt Wilt (voiced by Phil LaMarr) – The kind, red, very tall and disabled no. 1 imaginary friend with only a right arm and crooked left eye-stalk. However, in "Good Wilt Hunting", it is discovered that he was not always this way; he was injured during a basketball game, leaving his left eye crushed and his left arm injured. Wilt exhibits consummate good sportsmanship, which he applies to every part of life he can. He is considered the nicest person at Foster's and is known for being excessively polite and apologetic, saying “I’m sorry” all the time. Wilt has a big heart, is frequently cool and collected, and, only on very rare occasions shows anger at all. His oversized basketball shoes always squeak against the floor/ground, no matter what surface he is walking on. According to the episode "Room with a Feud", among him, Coco and Eduardo,